// Copyright (C) 2009 Jesse Jones
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

using System;

internal static class StringExtensions
{
	public static bool IsBlank(this string s)
	{
		foreach (char ch in s)
		{
			if (!char.IsWhiteSpace(ch))
				return false;
		}
		
		return true;
	}
	
	public static string EscapeAll(this string s)
	{
		var builder = new System.Text.StringBuilder(s.Length);
		
		foreach (char ch in s)
		{
			if (ch == '\n')
				builder.Append("\\n");
			
			else if (ch == '\r')
				builder.Append("\\r");
			
			else if (ch == '\t')
				builder.Append("\\t");
			
			else if (ch < ' ' || ch > '\x7F')
				builder.AppendFormat("\\x{0:X4}", (int) ch);
			
			else
				builder.Append(ch);
		}
		
		return builder.ToString();
	}
}
